996131520 has 140 divisors (see below), whose sum is σ = 3543507264. Its totient is φ = 265628160.

The previous prime is 996131519. The next prime is 996131537. The reversal of 996131520 is 25131699.

996131520 is a `hidden beast` number, since 9 + 9 + 613 + 15 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6705 + ... + 45135.

Almost surely, 2^996131520 is an apocalyptic number.

996131520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 996131520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1771753632).

996131520 is an abundant number, since it is smaller than the sum of its proper divisors (2547375744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

996131520 is a wasteful number, since it uses less digits than its factorization.

996131520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38460 (or 38441 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 996131520 is about 31561.5512926725. The cubic root of 996131520 is about 998.7088402908.

The spelling of 996131520 in words is "nine hundred ninety-six million, one hundred thirty-one thousand, five hundred twenty".